CN111573976B - Ancient biological laboratory sewage treatment method - Google Patents
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- CN111573976B CN111573976B CN202010422217.7A CN202010422217A CN111573976B CN 111573976 B CN111573976 B CN 111573976B CN 202010422217 A CN202010422217 A CN 202010422217A CN 111573976 B CN111573976 B CN 111573976B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
- C02F2101/14—Fluorine or fluorine-containing compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a method for treating waste water in an ancient biological laboratory, which comprises the following steps: firstly, collecting three types of sewage from a dental caries analysis chamber, a spore powder analysis chamber and a slicing and grinding chamber in a classified manner, converging the three types of sewage into an organic wastewater collection pool, a fluorine-containing acidic wastewater collection pool and a sludge collection pool, and then respectively carrying out targeted treatment on the separately collected sewage; the invention has the following beneficial effects: the technical scheme of the invention accords with the characteristics of the ancient biological test wastewater and has pertinence to the ancient biological test wastewater; the invention has better adaptability, shortens the retention time and ensures the standard discharge of the waste water; the invention adopts the mode of combining the anaerobic treatment process and the aerobic treatment to treat the waste water of the ancient biological laboratory, thereby reducing the operation cost, enhancing the sewage treatment effect and avoiding secondary pollution; the occupied area of the equipment is reduced, and the treatment method of the waste water in the ancient biological laboratory is further promoted.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a method for treating sewage in an ancient biological laboratory.
Background
Along with the continuous deep development of economic society of China, the construction status and the function of ecological civilization are increasingly prominent, and the construction of the ecological civilization is the welfare of people and concerns the future population of the nationality. Laboratory sewage is taken as a typical small pollution source, the discharge amount is small, the types are complex and intermittent, more importantly, the sewage discharge pipeline of some laboratories is directly connected with the drainage pipeline for residents, and the harm to the health of the residents and the water resource is immeasurable in the past. Therefore, many methods for laboratory wastewater treatment have been developed.
The invention patent with the patent number of CN102745862A discloses a sewage treatment method, and provides a sewage treatment method, wherein sewage is treated by the steps of filtering through a first filter screen, reducing through an iron reduction tank, neutralizing acid and alkali through an acid-alkali neutralization tank, performing MRM molecular resonance, performing biodegradation purification, keeping a post-treatment tank for 24 hours and the like in sequence, so that zero emission of the sewage is achieved after the sewage is treated. The invention has the advantages of lower cost, simple operation, no use of any chemical reagent in post treatment and no secondary pollution to the environment, and solves the pollution damage of pollutants such as heavy metal, microorganism and the like in the sewage of professional laboratories such as various research institutions, hospitals and the like to the environment. Although the invention has certain beneficial effects, the technical scheme of the invention has no universality and lacks pertinence to sewage treatment with complex components.
Ancient biology is the science of studying the appearance and development of biological interfaces in the geological history period, and the research objects are ancient biological remains and trails which live in the geological history period and are preserved in the stratum, and surrounding rocks containing the remains and trails. Ancient biology takes fossil as a basic research object, and the basic research work of the ancient biology comprises the collection, the excavation, the processing, the restoration, the identification and the description of the fossil, and the life style and the evolution law of various organisms, the reflected information of the ancient environment, the ancient geography and the like are further researched on the basis of the work.
As an important place for implementing the research of the ancient biology, the ancient biology laboratory sufficiently utilizes the advantages of the fossil resources which are unique in China, adopts the comprehensive research methods of a plurality of disciplines, and utilizes different biochemical physical research means to research the excavated ancient biology fossil so as to more completely restore the basic connotation and the law of the evolution of the ancient biology.
Disclosure of Invention
The invention aims to solve the technical problems and provide an ancient biological laboratory sewage treatment method with high efficiency.
The invention relates to a method for treating ancient biological laboratory sewage, which comprises the following steps:
s1: classifying and collecting three types of sewage respectively from a dental burr analysis chamber, a spore powder analysis chamber and a slicing and grinding chamber, and respectively converging the three types of sewage into an organic wastewater collection pool, a fluorine-containing acidic wastewater collection pool and a sludge collection pool;
s2: respectively carrying out targeted treatment on the wastewater collected by classification, wherein the treatment steps are as follows:
s2.1: sewage in the organic wastewater collection tank: performing acid-base regulation on sewage of a tooth-shaped spine analysis chamber collected in an organic wastewater collection tank, pumping the sewage after the acid-base regulation into an IC anaerobic reaction tower for anaerobic treatment, and pumping the sewage after the anaerobic treatment into a contact oxidation tank for aerobic treatment;
s2.2: sewage in the fluoride acid wastewater collection tank: pumping waste water of a spore powder analysis chamber collected in a fluorine-containing acidic waste water collecting tank into a first-stage reaction tank, adding a medicament for acid-base neutralization regulation, and pumping the neutralized waste water into a second-stage reaction tank for precipitation and flocculation;
s2.3: sewage in the sludge collection tank: carrying out filter pressing treatment on the sewage of the slicing and grinding chamber from the sludge collection tank by using a first filter press;
s3: and (4) collecting the sewage obtained by the treatment in the steps S2.1 and S2.2 into an MBR (membrane bioreactor) for centralized filtration treatment, and standing and precipitating in a clarification tank.
Preferably, the first filtrate obtained after the sewage in the sludge collection tank is treated by the first filter press is converged into the second-stage reaction tank to be precipitated and flocculated together with the sewage in the fluorine-containing acidic wastewater collection tank.
Preferably, lime milk and calcium chloride are used as acid-base regulators during the acid-base neutralization regulation of the sewage in the fluorine-containing acidic wastewater collection tank, and the specific regulation steps are adding the lime milk into the first-stage reaction tank and stirring, precipitating for 15-30 min, adding a calcium chloride solution and stirring, and precipitating for 15-30 min.
Preferably, the precipitation flocculation is carried out by collecting supernatant after acid-base neutralization and precipitation into a second-stage reaction tank, adding hydrochloric acid into the second-stage reaction tank to adjust the pH value to 3-8, and then adding a polyacrylamide flocculant.
Preferably, the specific steps of adjusting the acid and the alkali of the sewage in the organic wastewater collection tank are that firstly, 515-540 g/T of potassium carbonate is added to enable the content of potassium to reach the optimal stimulation concentration, and then, the pH value is adjusted to 5.5-7 by sodium carbonate.
Preferably, the precipitated sludge generated after the concentrated filtration treatment in the MBR bioreactor is subjected to filter pressing treatment by a second filter press, and a second filtrate generated after the filter pressing is returned to the contact oxidation pond for treatment again.
Preferably, a grid pool for removing most of fluoride is arranged between the fluorine-containing acidic wastewater collecting pool and the first-stage reaction pool.
Preferably, in step S2.1, a blower is used to blow air to the contact oxidation tank during the aerobic biochemical treatment.
The invention has the following beneficial effects:
1) the aerobic treatment adopts a contact oxidation process, accords with the characteristics of the waste water of the ancient biological test and has pertinence to the waste water;
2) the invention adopts the method of biological contact oxidation and MBR bioreactor to carry out biochemical treatment on the wastewater in the treatment of the organic wastewater, has better adaptability to the water quality and quantity of the wastewater to be treated, shortens the retention time, prevents the sludge from expanding, and ensures the standard discharge of the wastewater;
3) the invention adopts the mode of combining the anaerobic treatment process and the aerobic treatment to treat the waste water of the ancient biological laboratory, thereby reducing the operation cost, enhancing the sewage treatment effect and not generating secondary pollution;
4) the technical scheme of the invention realizes the high-efficiency and rapid treatment of the waste water of the ancient biological laboratory, simultaneously reduces the occupied area of equipment, ensures that the treated waste water reaches the sewage discharge standard, and further promotes the treatment method of the waste water of the ancient biological laboratory.
Drawings
FIG. 1 is a flow chart of a method for treating waste water from an ancient biological laboratory.
Detailed Description
The invention is further illustrated by the following examples.
The waste water of the ancient biology laboratory mainly comprises three parts: firstly, the organic wastewater generated in the production process of the dental spine analysis room mainly comprises water, calcium acetate and acetic acid, and the main pollutant is COD; secondly, the wastewater is acidic wastewater containing fluorine generated in the production process of a sporopollen analysis room, and the main pollutants are pH and fluorine ions; thirdly, waste water generated in the production process of the slicing and grinding chamber is divided, and the main components of the waste water are rock fragments and mud. In combination with the characteristics of the wastewater, the embodiment of the invention adopts the processes of classified collection → targeted treatment → final centralized treatment to treat the wastewater, and comprises the following specific steps:
s1: classifying and collecting three types of sewage respectively from a dental burr analysis chamber, a spore powder analysis chamber and a slicing and grinding chamber, and respectively converging the three types of sewage into an organic wastewater collection pool, a fluorine-containing acidic wastewater collection pool and a sludge collection pool;
s2: respectively carrying out targeted treatment on the wastewater collected by classification, wherein the treatment steps are as follows:
s2.1: sewage in the organic wastewater collection tank: performing acid-base regulation on sewage of a tooth-shaped spine analysis chamber collected in an organic wastewater collection tank, pumping the sewage subjected to acid-base regulation into an IC anaerobic reaction tower for anaerobic treatment, wherein the anaerobic treatment is performed for 8 hours at normal temperature, and pumping the sewage subjected to anaerobic treatment into a contact oxidation tank for aerobic treatment; and a fan is used for supplying air to the contact oxidation tank during the aerobic biochemical treatment.
The IC anaerobic reaction tower is a high-efficiency multistage internal circulation reactor, is a representative type of a third-generation anaerobic reactor, and has the characteristics of small occupied area, high organic load, strong impact resistance, stable performance and simpler operation. When the COD of the organic wastewater is 10000-15000 mg/L, the volume load of the IC anaerobic reaction towerThe rate can reach 15-30 kgCOD/m3Is far higher than other anaerobic reaction devices.
S2.2: sewage in the fluorine-containing acidic wastewater collection tank: pumping waste water of a spore powder analysis chamber collected in a fluorine-containing acidic waste water collecting tank into a first-stage reaction tank, adding a medicament for acid-base neutralization regulation, and pumping the neutralized waste water into a second-stage reaction tank for precipitation and flocculation;
s2.3: sewage in the sludge collection tank: carrying out filter pressing treatment on the sewage of the slicing and grinding chamber from the sludge collection tank by using a first filter press;
s3: and (4) collecting the sewage obtained by the treatment in the steps S2.1 and S2.2 into an MBR (membrane bioreactor) for centralized filtration treatment, and standing and precipitating in a clarification tank.
And discharging the supernatant liquor nano-tube of the clarification tank into a sewage discharge pipeline after precipitation.
And a first filtrate obtained after the sewage of the slicing and grinding chamber from the sludge collection tank is treated by the first filter press is converged into the second-stage reaction tank to be precipitated and flocculated together with the sewage in the fluorine-containing acidic wastewater collection tank.
Lime milk and calcium chloride are used as acid-base regulators during the acid-base neutralization regulation of the sewage in the fluorine-containing acidic wastewater collection tank, and the specific regulation step is to add the lime milk into the first reaction tank and stir, precipitate for 30min, add a calcium chloride solution and stir, and precipitate for 30 min.
The specific steps of the precipitation and flocculation are that supernatant after the precipitation after the neutralization of acid and alkali is converged into a second-stage reaction tank, hydrochloric acid is added into the second-stage reaction tank to adjust the pH value to 6, and then a polyacrylamide flocculant is added to be uniformly mixed and stirred for 3 hours.
The specific steps of acid-base regulation of the sewage in the organic wastewater collection tank are that firstly 530g/T of potassium carbonate is added to enable the potassium content to reach the optimal stimulation concentration, and then the pH value is regulated to 6.8 by sodium carbonate.
In order to avoid the medium inhibition, the dosage of sodium carbonate cannot exceed 8kg/T, and potassium carbonate is not added continuously during neutralization.
And carrying out filter pressing treatment on the precipitated sludge generated after the concentrated filtration treatment in the MBR bioreactor by using a second filter press, and returning a second filtrate generated after the filter pressing to the contact oxidation tank for retreatment.
Preferably, a grid pool for removing most of fluoride is arranged between the fluorine-containing acidic wastewater collecting pool and the first-stage reaction pool.
After sewage in the spore powder analysis chamber is converged into a fluorine-containing acidic sewage collecting tank, the sewage flows through a grating tank to pretreat the sewage so as to remove most of fluoride. The grid is 2~4 layers of filter screen in the grid pond, along the direction that the rivers flow in, the mesh of filter screen diminishes gradually.
In the embodiment of the invention, the sludge obtained after the filter pressing treatment of the filter press is classified and then is treated by entrusted other sludge treatment mechanisms.
After the biological laboratory sewage is treated for a plurality of times by adopting the steps, the detection data are as follows:
sludge containing rock debris and mud collected in the sludge collection pool enters a filter press for filter pressing treatment, then the sludge is pressed into mud cakes, and clear filtrate is obtained for continuous treatment.
The detection method of the fluorine ions in the embodiment of the invention adopts an ion selective electrode method, and the COD is determined by a potassium dichromate method; the results of the examples show that the fluorine content in the wastewater after the treatment in the examples of the invention is less than 10mg/L, and the COD concentration is less than 100mg/L, which meets the regulation of the comprehensive wastewater discharge standard in GB -.
The above-described preferred embodiments of the present invention are not intended to limit the present invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the claims of the present invention.
Claims (4)
1. An ancient biological laboratory sewage treatment method comprises the following steps:
s1: classifying and collecting three types of sewage respectively from a dental burr analysis chamber, a spore powder analysis chamber and a slicing and grinding chamber, and respectively converging the three types of sewage into an organic wastewater collection pool, a fluorine-containing acidic wastewater collection pool and a sludge collection pool;
s2: respectively carrying out targeted treatment on the wastewater collected by classification, wherein the treatment steps are as follows:
s2.1: sewage in the organic wastewater collection tank: performing acid-base regulation on sewage of a tooth-shaped spine analysis chamber collected in an organic wastewater collection tank, pumping the sewage after the acid-base regulation into an IC anaerobic reaction tower for anaerobic treatment, and pumping the sewage after the anaerobic treatment into a contact oxidation tank for aerobic treatment;
s2.2: sewage in the fluorine-containing acidic wastewater collection tank: pumping the spore powder analysis chamber wastewater collected in the fluorine-containing acidic wastewater collection tank into a first-stage reaction tank, adding a medicament for acid-base neutralization regulation, and pumping the neutralized wastewater into a second-stage reaction tank for precipitation and flocculation;
s2.3: sewage in the sludge collection tank: carrying out filter pressing treatment on the sewage of the slicing and grinding chamber from the sludge collection tank by using a first filter press;
s3: collecting the sewage treated in the steps S2.1 and S2.2 into an MBR bioreactor for centralized filtration treatment, and standing and precipitating in a clarification tank;
the sewage in the sludge collection tank is treated by a first filter press to obtain a first filtrate, and the first filtrate is converged into the second-stage reaction tank to be precipitated and flocculated together with the sewage in the fluorine-containing acidic wastewater collection tank;
lime milk and calcium chloride are used as acid-base regulators during the acid-base neutralization regulation of the sewage in the fluorine-containing acidic wastewater collection tank, the specific regulation step is to add the lime milk into the first-stage reaction tank and stir, after 15-30 min of precipitation, a calcium chloride solution is added and stirred, and the precipitation is 15-30 min;
the specific steps of the precipitation flocculation are that supernatant after the precipitation is neutralized by acid and alkali is converged into a second-stage reaction tank, hydrochloric acid is added into the second-stage reaction tank to adjust the pH value to 3-8, and a polyacrylamide flocculant is added;
the specific steps of carrying out acid-base regulation on the sewage in the organic wastewater collection tank are that firstly, 515-540 g/T of potassium carbonate is added to enable the content of potassium to reach the optimal stimulation concentration, and then, sodium carbonate is used for regulating the pH value to 5.5-7.
2. The ancient biological laboratory sewage treatment method according to claim 1, characterized in that: and carrying out filter pressing treatment on the precipitated sludge generated after the concentrated filtration treatment in the MBR bioreactor by using a second filter press, and returning a second filtrate generated after the filter pressing to the contact oxidation pond for retreatment.
3. The ancient biological laboratory sewage treatment method according to claim 1, characterized in that: a grid pond for removing most of fluoride is arranged between the fluorine-containing acidic wastewater collecting pond and the first-stage reaction pond.
4. The ancient biological laboratory sewage treatment method according to claim 1, characterized in that: in the step S2.1, a blower is used to blow air to the contact oxidation tank during the aerobic biochemical treatment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102603055A (en) * | 2010-12-20 | 2012-07-25 | 帕洛阿尔托研究中心公司 | Membrane Bioreactor and Moving Bed Bioreactor (MBBR) structures for wastewater treatment |
| CN104671584A (en) * | 2013-12-02 | 2015-06-03 | 天津市庆安特种设备研发有限公司 | Acrylonitrile wastewater advanced oxidation-anaerobic-MBBR (moving bed biofilm reactor)-MBR (membrane bioreactor) treatment device |
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| CN109020049A (en) * | 2018-07-11 | 2018-12-18 | 浙江清天地环境工程有限公司 | Laboratory integration waste water treatment system and method |
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